Datasheet

Cisco UCS C240 M3 High-Density Rack Server (Small Form Factor Disk Drive Model)
CONFIGURING the SERVER
21
— DIMM population (how many DIMMs per channel are populated)
— BIOS setting.
For the DIMMs to run in power-savings mode (1.35 V, if the DIMM supports this), change
the BIOS setting to power-savings mode.
■ With 3 RDIMMs populated per channel, memory always runs at 1.5 V regardless if the BIOS
setting is power-savings mode (1.35 V) or performance mode (1.5 V).
■ With 3 LRDIMMs populated per channel, memory can operate at 1.5 V or 1.35 V, depending
on the BIOS setting.
■ With 3 DIMMs populated per channel, 16 GB and 8 GB 1600-MHz RDIMMs run at a maximum
speed of 1333 and 1066 MHz, respectively (for 1600- and 1866-MHz CPUs). Other memory
devices are limited to 1066 MHz operation when populated at 3 DPC.
For more information regarding memory, see CPUs and DIMMs, page 64.